/*
 * Copyright (C) 2008 Universidade Federal de Campina Grande
 *  
 * This file is part of OurGrid. 
 *
 * OurGrid is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free 
 * Software Foundation, either version 3 of the License, or (at your option) 
 * any later version. 
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT 
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
 * for more details. 
 * 
 * You should have received a copy of the GNU Lesser General Public License 
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * 
 */
package org.ourgrid.peer.controller;

import org.ourgrid.common.interfaces.LocalWorkerProviderClient;
import org.ourgrid.common.interfaces.Worker;
import org.ourgrid.common.interfaces.management.RemoteWorkerManagementClient;
import org.ourgrid.peer.PeerConstants;
import org.ourgrid.peer.controller.messages.WorkerMessages;
import org.ourgrid.peer.dao.AllocationDAO;
import org.ourgrid.peer.dao.UsersDAO;
import org.ourgrid.peer.to.PeerUserReference;
import org.ourgrid.peer.to.RemoteAllocableWorker;
import org.ourgrid.reqtrace.Req;

import br.edu.ufcg.lsd.commune.api.FailureNotification;
import br.edu.ufcg.lsd.commune.api.InvokeOnDeploy;
import br.edu.ufcg.lsd.commune.api.MonitoredBy;
import br.edu.ufcg.lsd.commune.api.RecoveryNotification;
import br.edu.ufcg.lsd.commune.container.servicemanager.ServiceManager;
import br.edu.ufcg.lsd.commune.identification.DeploymentID;

public class RemoteWorkerManagementClientController implements RemoteWorkerManagementClient {

	private ServiceManager serviceManager;

	@SuppressWarnings("unused")
	@InvokeOnDeploy
	public void init(ServiceManager serviceManager) {
		this.serviceManager = serviceManager;
	}
	
	@Req("REQ112")
	public void statusChangedAllocatedForBroker(
			@MonitoredBy(PeerConstants.REMOTE_WORKER_MANAGEMENT_CLIENT) Worker worker) {
		String wmPublicKey = serviceManager.getSenderPublicKey();
		
		AllocationDAO allocationDAO = serviceManager.getDAO(AllocationDAO.class);
		RemoteAllocableWorker remoteAllocableWorker = allocationDAO.getRemoteAllocableWorker(wmPublicKey);
		
		if (remoteAllocableWorker == null) {
			serviceManager.getLog().warn(WorkerMessages.getUnknownRemoteWorkerStatusChangedMessage(wmPublicKey));
			return;
		}
		
		DeploymentID rwmDID = serviceManager.getStubDeploymentID(remoteAllocableWorker.getWorkerManagement());
		
		if (worker == null) {
			serviceManager.getLog().warn(WorkerMessages.getNullRemoteWorkerStatusChangedMessage(rwmDID));
			return;
		}
		
		String lwpcPubKey = remoteAllocableWorker.getConsumer().getPublicKey();
		
		PeerUserReference loggedUser = serviceManager.getDAO(UsersDAO.class).getLoggedUser(lwpcPubKey);
		
		if (loggedUser == null) {
			serviceManager.getLog().warn(WorkerMessages.getUnknownConsumerAllocatedForBroker(lwpcPubKey));
			return;
		}
		
		LocalWorkerProviderClient lwpc = loggedUser.getClient();
		
		if (lwpc != null) {
			
			DeploymentID lwpcDID = serviceManager.getStubDeploymentID(lwpc);
			
			serviceManager.getLog().debug(WorkerMessages.getGivingRemoteWorkerMessage(lwpcDID, rwmDID));
			lwpc.hereIsWorker(worker, remoteAllocableWorker.getWorkerSpec(), 
					remoteAllocableWorker.getRequest().getSpec());
			
			remoteAllocableWorker.setAsDelivered();
			
			serviceManager.release(worker);
		}
	}
	
	@RecoveryNotification 
	public void workerIsUp(Worker worker) {}
	
	@FailureNotification 
	public void workerIsDown(Worker worker) {}
}